gdb/tui/tui.c

   1 /*
   2 ** tui.c
   3 **         General functions for the WDB TUI
   4 */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <ctype.h>
   9 #include <malloc.h>
  10 #include <curses.h>
  11 #ifdef HAVE_TERM_H
  12 #include <term.h>
  13 #endif
  14 #include <signal.h>
  15 #include <fcntl.h>
  16 #include <termio.h>
  17 #include <setjmp.h>
  18 #include "defs.h"
  19 #include "gdbcmd.h"
  20 #include "tui.h"
  21 #include "tuiData.h"
  22 #include "tuiLayout.h"
  23 #include "tuiIO.h"
  24 #include "tuiRegs.h"
  25 #include "tuiWin.h"
  26
  27 /* The Solaris header files seem to provide no declaration for this at
  28    all when __STDC__ is defined.  This shouldn't conflict with
  29    anything.  */
  30 extern char *tgoto ();
  31
  32 /***********************
  33 ** Local Definitions
  34 ************************/
  35 #define FILEDES         2
  36 /* Solaris <sys/termios.h> defines CTRL. */
  37 #ifndef CTRL
  38 #define CTRL(x)         (x & ~0140)
  39 #endif
  40 #define CHK(val, dft)   (val<=0 ? dft : val)
  41
  42 #define TOGGLE_USAGE "Usage:toggle breakpoints"
  43 #define TUI_TOGGLE_USAGE "Usage:\ttoggle $fregs\n\ttoggle breakpoints"
  44
  45 /*****************************
  46 ** Local static forward decls
  47 ******************************/
  48 static void _tuiReset PARAMS ((void));
  49 static void _toggle_command PARAMS ((char *, int));
  50 static void _tui_vToggle_command PARAMS ((va_list));
  51 static Opaque _tui_vDo PARAMS ((TuiOpaqueFuncPtr, va_list));
  52
  53
  54
  55 /***********************
  56 ** Public Functions
  57 ************************/
  58
  59 /*
  60 ** tuiInit().
  61 */
  62 void
  63 #ifdef __STDC__
  64 tuiInit (char *argv0)
  65 #else
  66 tuiInit (argv0)
  67      char *argv0;
  68 #endif
  69 {
  70   extern void init_page_info ();
  71   extern void initialize_tui_files PARAMS ((void));
  72
  73   initialize_tui_files ();
  74   initializeStaticData ();
  75   initscr ();
  76   refresh ();
  77   setTermHeightTo (LINES);
  78   setTermWidthTo (COLS);
  79   tuiInitWindows ();
  80   wrefresh (cmdWin->generic.handle);
  81   init_page_info ();
  82   /* Don't hook debugger output if doing command-window
  83      * the XDB way. However, one thing we do want to do in
  84      * XDB style is set up the scrolling region to be
  85      * the bottom of the screen (tuiTermUnsetup()).
  86      */
  87   fputs_unfiltered_hook = NULL;
  88   flush_hook = NULL;
  89   rl_initialize ();             /* need readline initialization to
  90                       * create termcap sequences
  91                       */
  92   tuiTermUnsetup (1, cmdWin->detail.commandInfo.curch);
  93
  94   return;
  95 }                               /* tuiInit */
  96
  97
  98 /*
  99 ** tuiInitWindows().
 100 */
 101 void
 102 #ifdef __STDC__
 103 tuiInitWindows (void)
 104 #else
 105 tuiInitWindows ()
 106 #endif
 107 {
 108   TuiWinType type;
 109
 110   tuiSetLocatorContent (0);
 111   showLayout (SRC_COMMAND);
 112   keypad (cmdWin->generic.handle, TRUE);
 113   echo ();
 114   crmode ();
 115   nl ();
 116   tuiSetWinFocusTo (srcWin);
 117
 118   return;
 119 }                               /* tuiInitWindows */
 120
 121
 122 /*
 123 ** tuiCleanUp().
 124 **        Kill signal handler and cleanup termination method
 125 */
 126 void
 127 #ifdef __STDC__
 128 tuiResetScreen (void)
 129 #else
 130 tuiResetScreen ()
 131 #endif
 132 {
 133   TuiWinType type = SRC_WIN;
 134
 135   keypad (cmdWin->generic.handle, FALSE);
 136   for (; type < MAX_MAJOR_WINDOWS; type++)
 137     {
 138       if (m_winPtrNotNull (winList[type]) &&
 139           winList[type]->generic.type != UNDEFINED_WIN &&
 140           !winList[type]->generic.isVisible)
 141         tuiDelWindow (winList[type]);
 142     }
 143   endwin ();
 144   initscr ();
 145   refresh ();
 146   echo ();
 147   crmode ();
 148   nl ();
 149
 150   return;
 151 }                               /* tuiResetScreen */
 152
 153
 154 /*
 155 ** tuiCleanUp().
 156 **        Kill signal handler and cleanup termination method
 157 */
 158 void
 159 #ifdef __STDC__
 160 tuiCleanUp (void)
 161 #else
 162 tuiCleanUp ()
 163 #endif
 164 {
 165   char *buffer;
 166   extern char *term_cursor_move;
 167
 168   signal (SIGINT, SIG_IGN);
 169   tuiTermSetup (0);             /* Restore scrolling region to whole screen */
 170   keypad (cmdWin->generic.handle, FALSE);
 171   freeAllWindows ();
 172   endwin ();
 173   buffer = tgoto (term_cursor_move, 0, termHeight ());
 174   tputs (buffer, 1, putchar);
 175   _tuiReset ();
 176
 177   return;
 178 }                               /* tuiCleanUp */
 179
 180
 181 /*
 182 ** tuiError().
 183 */
 184 void
 185 #ifdef __STDC__
 186 tuiError (
 187            char *string,
 188            int exitGdb)
 189 #else
 190 tuiError (string, exitGdb)
 191      char *string;
 192      int exitGdb;
 193 #endif
 194 {
 195   puts_unfiltered (string);
 196   if (exitGdb)
 197     {
 198       tuiCleanUp ();
 199       exit (-1);
 200     }
 201
 202   return;
 203 }                               /* tuiError */
 204
 205
 206 /*
 207 ** tui_vError()
 208 **        tuiError with args in a va_list.
 209 */
 210 void
 211 #ifdef __STDC__
 212 tui_vError (
 213              va_list args)
 214 #else
 215 tui_vError (args)
 216      va_list args;
 217 #endif
 218 {
 219   char *string;
 220   int exitGdb;
 221
 222   string = va_arg (args, char *);
 223   exitGdb = va_arg (args, int);
 224
 225   tuiError (string, exitGdb);
 226
 227   return;
 228 }                               /* tui_vError */
 229
 230
 231 /*
 232 ** tuiFree()
 233 **    Wrapper on top of free() to ensure that input address is greater than 0x0
 234 */
 235 void
 236 #ifdef __STDC__
 237 tuiFree (
 238           char *ptr)
 239 #else
 240 tuiFree (ptr)
 241      char *ptr;
 242 #endif
 243 {
 244   if (ptr != (char *) NULL)
 245     {
 246       free (ptr);
 247     }
 248
 249   return;
 250 }                               /* tuiFree */
 251
 252
 253 /* tuiGetLowDisassemblyAddress().
 254 **        Determine what the low address will be to display in the TUI's
 255 **        disassembly window.  This may or may not be the same as the
 256 **        low address input.
 257 */
 258 Opaque
 259 #ifdef __STDC__
 260 tuiGetLowDisassemblyAddress (
 261                               Opaque low,
 262                               Opaque pc)
 263 #else
 264 tuiGetLowDisassemblyAddress (low, pc)
 265      Opaque low;
 266      Opaque pc;
 267 #endif
 268 {
 269   int line;
 270   Opaque newLow;
 271
 272   /*
 273     ** Determine where to start the disassembly so that the pc is about in the
 274     ** middle of the viewport.
 275     */
 276   for (line = 0, newLow = pc;
 277        (newLow > low &&
 278         line < (tuiDefaultWinViewportHeight (DISASSEM_WIN,
 279                                              DISASSEM_COMMAND) / 2));)
 280     {
 281       bfd_byte buffer[4];
 282
 283       newLow -= sizeof (bfd_getb32 (buffer));
 284       line++;
 285     }
 286
 287   return newLow;
 288 }                               /* tuiGetLowDisassemblyAddress */
 289
 290
 291 /* tui_vGetLowDisassemblyAddress().
 292 **        Determine what the low address will be to display in the TUI's
 293 **        disassembly window with args in a va_list.
 294 */
 295 Opaque
 296 #ifdef __STDC__
 297 tui_vGetLowDisassemblyAddress (
 298                                 va_list args)
 299 #else
 300 tui_vGetLowDisassemblyAddress (args)
 301      va_list args;
 302 #endif
 303 {
 304   int line;
 305   Opaque newLow;
 306   Opaque low;
 307   Opaque pc;
 308
 309   low = va_arg (args, Opaque);
 310   pc = va_arg (args, Opaque);
 311
 312   return (tuiGetLowDisassemblyAddress (low, pc));
 313
 314 }                               /* tui_vGetLowDisassemblyAddress */
 315
 316
 317 /*
 318 ** tuiDo().
 319 **        General purpose function to execute a tui function.  Transitions
 320 **        between curses and the are handled here.  This function is called
 321 **        by non-tui gdb functions.
 322 **
 323 **        Errors are caught here.
 324 **        If there is no error, the value returned by 'func' is returned.
 325 **        If there is an error, then zero is returned.
 326 **
 327 **       Must not be called with immediate_quit in effect (bad things might
 328 **       happen, say we got a signal in the middle of a memcpy to quit_return).
 329 **       This is an OK restriction; with very few exceptions immediate_quit can
 330 **       be replaced by judicious use of QUIT.
 331 */
 332 Opaque
 333 #ifdef __STDC__
 334 tuiDo (
 335         TuiOpaqueFuncPtr func,...)
 336 #else
 337 tuiDo (func, va_alist)
 338      TuiOpaqueFuncPtr func;
 339      va_dcl
 340 #endif
 341 {
 342   extern int terminal_is_ours;
 343
 344   Opaque ret = (Opaque) NULL;
 345
 346   /* It is an error to be tuiDo'ing if we
 347      * don't own the terminal.
 348      */
 349   if (!terminal_is_ours)
 350     return ret;
 351
 352   if (tui_version)
 353     {
 354       va_list args;
 355
 356 #ifdef __STDC__
 357       va_start (args, func);
 358 #else
 359       va_start (args);
 360 #endif
 361       ret = _tui_vDo (func, args);
 362       va_end (args);
 363     }
 364
 365   return ret;
 366 }                               /* tuiDo */
 367
 368
 369 /*
 370 ** tuiDoAndReturnToTop().
 371 **        General purpose function to execute a tui function.  Transitions
 372 **        between curses and the are handled here.  This function is called
 373 **        by non-tui gdb functions who wish to reset gdb to the top level.
 374 **        After the tuiDo is performed, a return to the top level occurs.
 375 **
 376 **        Errors are caught here.
 377 **        If there is no error, the value returned by 'func' is returned.
 378 **        If there is an error, then zero is returned.
 379 **
 380 **       Must not be called with immediate_quit in effect (bad things might
 381 **       happen, say we got a signal in the middle of a memcpy to quit_return).
 382 **       This is an OK restriction; with very few exceptions immediate_quit can
 383 **       be replaced by judicious use of QUIT.
 384 **
 385 */
 386 Opaque
 387 #ifdef __STDC__
 388 tuiDoAndReturnToTop (
 389                       TuiOpaqueFuncPtr func,...)
 390 #else
 391 tuiDoAndReturnToTop (func, va_alist)
 392      TuiOpaqueFuncPtr func;
 393      va_dcl
 394 #endif
 395 {
 396   extern int terminal_is_ours;
 397
 398   Opaque ret = (Opaque) NULL;
 399
 400   /* It is an error to be tuiDo'ing if we
 401      * don't own the terminal.
 402      */
 403   if (!terminal_is_ours)
 404     return ret;
 405
 406   if (tui_version)
 407     {
 408       va_list args;
 409
 410 #ifdef __STDC__
 411       va_start (args, func);
 412 #else
 413       va_start (args);
 414 #endif
 415       ret = _tui_vDo (func, args);
 416
 417       /* force a return to the top level */
 418       return_to_top_level (RETURN_ERROR);
 419     }
 420
 421   return ret;
 422 }                               /* tuiDoAndReturnToTop */
 423
 424
 425 void
 426 #ifdef __STDC__
 427 tui_vSelectSourceSymtab (
 428                           va_list args)
 429 #else
 430 tui_vSelectSourceSymtab (args)
 431      va_list args;
 432 #endif
 433 {
 434   struct symtab *s = va_arg (args, struct symtab *);
 435
 436   select_source_symtab (s);
 437   return;
 438 }                               /* tui_vSelectSourceSymtab */
 439
 440
 441 /*
 442 ** _initialize_tui().
 443 **      Function to initialize gdb commands, for tui window manipulation.
 444 */
 445 void
 446 _initialize_tui ()
 447 {
 448 #if 0
 449   if (tui_version)
 450     {
 451       add_com ("toggle", class_tui, _toggle_command,
 452                "Toggle Terminal UI Features\n\
 453 Usage: Toggle $fregs\n\
 454 \tToggles between single and double precision floating point registers.\n");
 455     }
 456 #endif
 457   char *helpStr;
 458
 459   if (tui_version)
 460     helpStr = "Toggle Specified Features\n\
 461 Usage:\ttoggle $fregs\n\ttoggle breakpoints";
 462   else
 463     helpStr = "Toggle Specified Features\nUsage:toggle breakpoints";
 464   add_abbrev_prefix_cmd ("toggle",
 465                          class_tui,
 466                          _toggle_command,
 467                          helpStr,
 468                          &togglelist,
 469                          "toggle ",
 470                          1,
 471                          &cmdlist);
 472 }                               /* _initialize_tui*/
 473
 474
 475 /*
 476 ** va_catch_errors().
 477 **       General purpose function to execute a function, catching errors.
 478 **       If there is no error, the value returned by 'func' is returned.
 479 **       If there is error, then zero is returned.
 480 **       Note that 'func' must take a variable argument list as well.
 481 **
 482 **       Must not be called with immediate_quit in effect (bad things might
 483 **       happen, say we got a signal in the middle of a memcpy to quit_return).
 484 **       This is an OK restriction; with very few exceptions immediate_quit can
 485 **       be replaced by judicious use of QUIT.
 486 */
 487 Opaque
 488 #ifdef __STDC__
 489 va_catch_errors (
 490                   TuiOpaqueFuncPtr func,
 491                   va_list args)
 492 #else
 493 va_catch_errors (func, args)
 494      TuiOpaqueFuncPtr func;
 495      va_list args;
 496 #endif
 497 {
 498   Opaque ret = (Opaque) NULL;
 499
 500   /*
 501   ** We could have used catch_errors(), but it doesn't handle variable args.
 502   ** Also, for the tui, we always want to catch all errors, so we don't
 503   ** need to pass a mask, or an error string.
 504   */
 505   jmp_buf saved_error;
 506   jmp_buf saved_quit;
 507   jmp_buf tmp_jmp;
 508   struct cleanup *saved_cleanup_chain;
 509   char *saved_error_pre_print;
 510   char *saved_quit_pre_print;
 511   extern jmp_buf error_return;
 512   extern jmp_buf quit_return;
 513
 514   saved_cleanup_chain = save_cleanups ();
 515   saved_error_pre_print = error_pre_print;
 516   saved_quit_pre_print = quit_pre_print;
 517
 518   memcpy ((char *) saved_error, (char *) error_return, sizeof (jmp_buf));
 519   error_pre_print = "";
 520   memcpy (saved_quit, quit_return, sizeof (jmp_buf));
 521   quit_pre_print = "";
 522
 523   if (setjmp (tmp_jmp) == 0)
 524     {
 525       va_list argList = args;
 526       memcpy (error_return, tmp_jmp, sizeof (jmp_buf));
 527       memcpy (quit_return, tmp_jmp, sizeof (jmp_buf));
 528       ret = func (argList);
 529     }
 530   restore_cleanups (saved_cleanup_chain);
 531   memcpy (error_return, saved_error, sizeof (jmp_buf));
 532   error_pre_print = saved_error_pre_print;
 533   memcpy (quit_return, saved_quit, sizeof (jmp_buf));
 534   quit_pre_print = saved_quit_pre_print;
 535
 536   return ret;
 537 }
 538
 539 /*
 540 ** vcatch_errors().
 541 **        Catch errors occurring in tui or non tui function, handling
 542 **        variable param lists. Note that 'func' must take a variable
 543 **        argument list as well.
 544 */
 545 Opaque
 546 #ifdef __STDC__
 547 vcatch_errors (
 548                 OpaqueFuncPtr func,...)
 549 #else
 550 vcatch_errors (va_alist)
 551      va_dcl
 552 /*
 553 vcatch_errors(func, va_alist)
 554     OpaqueFuncPtr    func;
 555     va_dcl
 556 */
 557 #endif
 558 {
 559   Opaque ret = (Opaque) NULL;
 560   va_list args;
 561 #ifdef __STDC__
 562   va_start (args, func);
 563 /*
 564     va_arg(args, OpaqueFuncPtr);
 565 */
 566 #else
 567   OpaqueFuncPtr func;
 568
 569   va_start (args);
 570   func = va_arg (args, OpaqueFuncPtr);
 571 #endif
 572   ret = va_catch_errors (func, args);
 573   va_end (args);
 574
 575   return ret;
 576 }
 577
 578
 579 void
 580 #ifdef __STDC__
 581 strcat_to_buf (
 582                 char *buf,
 583                 int buflen,
 584                 char *itemToAdd)
 585 #else
 586 strcat_to_buf (buf, buflen, itemToAdd)
 587      char *buf;
 588      int buflen;
 589      char *itemToAdd;
 590 #endif
 591 {
 592   if (itemToAdd != (char *) NULL && buf != (char *) NULL)
 593     {
 594       if ((strlen (buf) + strlen (itemToAdd)) <= buflen)
 595         strcat (buf, itemToAdd);
 596       else
 597         strncat (buf, itemToAdd, (buflen - strlen (buf)));
 598     }
 599
 600   return;
 601 }                               /* strcat_to_buf */
 602
 603 /* VARARGS */
 604 void
 605 #ifdef ANSI_PROTOTYPES
 606 strcat_to_buf_with_fmt (
 607                          char *buf,
 608                          int bufLen,
 609                          char *format,...)
 610 #else
 611 strcat_to_buf_with_fmt (va_alist)
 612      va_dcl
 613 #endif
 614 {
 615   char *linebuffer;
 616   struct cleanup *old_cleanups;
 617   va_list args;
 618 #ifdef ANSI_PROTOTYPES
 619   va_start (args, format);
 620 #else
 621   char *buf;
 622   int bufLen;
 623   char *format;
 624
 625   va_start (args);
 626   buf = va_arg (args, char *);
 627   bufLen = va_arg (args, int);
 628   format = va_arg (args, char *);
 629 #endif
 630   vasprintf (&linebuffer, format, args);
 631   old_cleanups = make_cleanup (free, linebuffer);
 632   strcat_to_buf (buf, bufLen, linebuffer);
 633   do_cleanups (old_cleanups);
 634   va_end (args);
 635 }
 636
 637
 638
 639
 640
 641 /***********************
 642 ** Static Functions
 643 ************************/
 644
 645
 646 /*
 647 ** _tui_vDo().
 648 **        General purpose function to execute a tui function.  Transitions
 649 **        between curses and the are handled here.  This function is called
 650 **        by non-tui gdb functions.
 651 **
 652 **        Errors are caught here.
 653 **        If there is no error, the value returned by 'func' is returned.
 654 **        If there is an error, then zero is returned.
 655 **
 656 **       Must not be called with immediate_quit in effect (bad things might
 657 **       happen, say we got a signal in the middle of a memcpy to quit_return).
 658 **       This is an OK restriction; with very few exceptions immediate_quit can
 659 **       be replaced by judicious use of QUIT.
 660 */
 661 static Opaque
 662 #ifdef __STDC__
 663 _tui_vDo (
 664            TuiOpaqueFuncPtr func,
 665            va_list args)
 666 #else
 667 _tui_vDo (func, args)
 668      TuiOpaqueFuncPtr func;
 669      va_list args;
 670 #endif
 671 {
 672   extern int terminal_is_ours;
 673
 674   Opaque ret = (Opaque) NULL;
 675
 676   /* It is an error to be tuiDo'ing if we
 677      * don't own the terminal.
 678      */
 679   if (!terminal_is_ours)
 680     return ret;
 681
 682   if (tui_version)
 683     {
 684       /* If doing command window the "XDB way" (command window
 685          * is unmanaged by curses...
 686          */
 687       /* Set up terminal for TUI */
 688       tuiTermSetup (1);
 689
 690       ret = va_catch_errors (func, args);
 691
 692       /* Set up terminal for command window */
 693       tuiTermUnsetup (1, cmdWin->detail.commandInfo.curch);
 694     }
 695
 696   return ret;
 697 }                               /* _tui_vDo */
 698
 699
 700 static void
 701 #ifdef __STDC__
 702 _toggle_command (
 703                   char *arg,
 704                   int fromTTY)
 705 #else
 706 _toggle_command (arg, fromTTY)
 707      char *arg;
 708      int fromTTY;
 709 #endif
 710 {
 711   printf_filtered ("Specify feature to toggle.\n%s\n",
 712                    (tui_version) ? TUI_TOGGLE_USAGE : TOGGLE_USAGE);
 713 /*
 714   tuiDo((TuiOpaqueFuncPtr)_Toggle_command, arg, fromTTY);
 715 */
 716 }
 717
 718 /*
 719 ** _tui_vToggle_command().
 720 */
 721 static void
 722 #ifdef __STDC__
 723 _tui_vToggle_command (
 724                        va_list args)
 725 #else
 726 _tui_vToggle_command (args)
 727      va_list args;
 728 #endif
 729 {
 730   char *arg;
 731   int fromTTY;
 732
 733   arg = va_arg (args, char *);
 734
 735   if (arg == (char *) NULL)
 736     printf_filtered (TOGGLE_USAGE);
 737   else
 738     {
 739       char *ptr = (char *) tuiStrDup (arg);
 740       int i;
 741
 742       for (i = 0; (ptr[i]); i++)
 743         ptr[i] = toupper (arg[i]);
 744
 745       if (subsetCompare (ptr, TUI_FLOAT_REGS_NAME))
 746         tuiToggleFloatRegs ();
 747 /*        else if (subsetCompare(ptr, "ANOTHER TOGGLE OPTION"))
 748             ...
 749 */
 750       else
 751         printf_filtered (TOGGLE_USAGE);
 752       tuiFree (ptr);
 753     }
 754
 755   return;
 756 }                               /* _tuiToggle_command */
 757
 758
 759 static void
 760 #ifdef __STDC__
 761 _tuiReset (void)
 762 #else
 763 _tuiReset ()
 764 #endif
 765 {
 766   struct termio mode;
 767
 768   /*
 769     ** reset the teletype mode bits to a sensible state.
 770     ** Copied tset.c
 771     */
 772 #if ! defined (USG) && defined (TIOCGETC)
 773   struct tchars tbuf;
 774 #endif /* !USG && TIOCGETC */
 775 #ifdef UCB_NTTY
 776   struct ltchars ltc;
 777
 778   if (ldisc == NTTYDISC)
 779     {
 780       ioctl (FILEDES, TIOCGLTC, &ltc);
 781       ltc.t_suspc = CHK (ltc.t_suspc, CTRL ('Z'));
 782       ltc.t_dsuspc = CHK (ltc.t_dsuspc, CTRL ('Y'));
 783       ltc.t_rprntc = CHK (ltc.t_rprntc, CTRL ('R'));
 784       ltc.t_flushc = CHK (ltc.t_flushc, CTRL ('O'));
 785       ltc.t_werasc = CHK (ltc.t_werasc, CTRL ('W'));
 786       ltc.t_lnextc = CHK (ltc.t_lnextc, CTRL ('V'));
 787       ioctl (FILEDES, TIOCSLTC, &ltc);
 788     }
 789 #endif /* UCB_NTTY */
 790 #ifndef USG
 791 #ifdef TIOCGETC
 792   ioctl (FILEDES, TIOCGETC, &tbuf);
 793   tbuf.t_intrc = CHK (tbuf.t_intrc, CTRL ('?'));
 794   tbuf.t_quitc = CHK (tbuf.t_quitc, CTRL ('\\'));
 795   tbuf.t_startc = CHK (tbuf.t_startc, CTRL ('Q'));
 796   tbuf.t_stopc = CHK (tbuf.t_stopc, CTRL ('S'));
 797   tbuf.t_eofc = CHK (tbuf.t_eofc, CTRL ('D'));
 798   /* brkc is left alone */
 799   ioctl (FILEDES, TIOCSETC, &tbuf);
 800 #endif /* TIOCGETC */
 801   mode.sg_flags &= ~(RAW
 802 #ifdef CBREAK
 803                      | CBREAK
 804 #endif /* CBREAK */
 805                      | VTDELAY | ALLDELAY);
 806   mode.sg_flags |= XTABS | ECHO | CRMOD | ANYP;
 807 #else /*USG*/
 808   ioctl (FILEDES, TCGETA, &mode);
 809   mode.c_cc[VINTR] = CHK (mode.c_cc[VINTR], CTRL ('?'));
 810   mode.c_cc[VQUIT] = CHK (mode.c_cc[VQUIT], CTRL ('\\'));
 811   mode.c_cc[VEOF] = CHK (mode.c_cc[VEOF], CTRL ('D'));
 812
 813   mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | INLCR | IGNCR | IUCLC | IXOFF);
 814   mode.c_iflag |= (BRKINT | ISTRIP | ICRNL | IXON);
 815   mode.c_oflag &= ~(OLCUC | OCRNL | ONOCR | ONLRET | OFILL | OFDEL |
 816                     NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY);
 817   mode.c_oflag |= (OPOST | ONLCR);
 818   mode.c_cflag &= ~(CSIZE | PARODD | CLOCAL);
 819 #ifndef hp9000s800
 820   mode.c_cflag |= (CS8 | CREAD);
 821 #else /*hp9000s800*/
 822   mode.c_cflag |= (CS8 | CSTOPB | CREAD);
 823 #endif /* hp9000s800 */
 824   mode.c_lflag &= ~(XCASE | ECHONL | NOFLSH);
 825   mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOK);
 826   ioctl (FILEDES, TCSETAW, &mode);
 827 #endif /* USG */
 828
 829   return;
 830 }                               /* _tuiReset */